Since I live in Brazil and quality 2M kits are not available or very expensive today I´ve decided to design my own 2 meter plane. I´ll try to put my design and progress in this forum. Time is very scarce in my life, but I think I can have a couple of nightly hours daily. My first consideration was about the engine to use...I´d rather using a gasser because of the costs. Here we have the Kroma 30i (1.83cu.in.) which is rated at 3hp and said to turn a 18x10 at 7300rpm with a can type muffler (www.lem.com.br). The weight is about 1250g (about 44oz) with the ignition but without the muffler/pipe. Does this is enough to haul a 5kg airplane to perform the FAI sequence? Looking at the weight of the power package on the Bob Pastorello´s site, the OS160 he uses came out at about 1550g for the entire package. I think using the gasser I could come at about 1750-1850g.
So I have to built it light!
Here goes the basic outline of the airplane. The wing location may get foward of the presented depending on the weight of the engine package. The fuse will be built out of balsa and ply with slab sides and rounded tops and bottoms. The wing and stabilizer will be the built up type. I´ll be using a thinned down (11%) Eppler 168 airfoil at root and have not decided yet on the airfoil at the tip, maybe a 10% E168. The stabilizer airfoil is a EH 9% or will be a SD 8020.
Any suggestion are welcomed.
Does anybody has drawings of servos, receivers, hardware in DXF format?
So long....